A302477 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 1172, 25599, 331044, 9731423, 251512646, 6145486847, 156721340433, 3938762027049, 99161137434780, 2502333421316265, 63048464625076923, 1588988448308340859, 40053623791997129840, 1009515780698038381251

Offset

1,2

Comments

Row 7 of A302472.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..1..0. .0..0..1..1..0. .0..0..1..1..0. .0..0..1..1..0
..0..1..0..0..1. .0..1..0..1..1. .0..1..0..0..1. .1..0..1..0..1
..1..1..0..1..1. .1..1..0..1..1. .1..1..0..1..1. .1..1..1..0..0
..0..1..0..0..0. .0..1..0..0..0. .1..1..0..0..1. .1..0..0..1..0
..1..0..1..1..1. .1..0..1..0..1. .1..0..0..1..1. .0..1..0..0..1
..1..1..0..0..0. .0..1..1..1..0. .1..1..0..0..1. .1..1..0..1..0

Crossrefs

Cf. A302472.

Sequence in context: A302230 A302673 A230706 * A303258 A230738 A302386

Adjacent sequences: A302474 A302475 A302476 * A302478 A302479 A302480

Keyword

nonn

Author

R. H. Hardin, Apr 08 2018

Status

approved